Package org.jcsp.plugNplay.ints
Class Plex2Int
- java.lang.Object
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- org.jcsp.plugNplay.ints.Plex2Int
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- All Implemented Interfaces:
CSProcess
public final class Plex2Int extends java.lang.Object implements CSProcess
Fair multiplexes two integer streams into one.Process Diagram
in0 __________ -->--| | out in1 | Plex2Int |-->-- -->--|__________|
Description
Plex2Int is a process whose output stream is a fair multiplexing of its input streams. It makes no assumptions about the traffic patterns occuring on the input streams and ensures that no input stream will be starved by busy siblings. It guarantees that if an input stream has data pending, no other stream will be serviced twice before that data is serviced.Channel Protocols
Input Channels in0, in1 int The input streams. Output Channels out int The multiplexed output stream. Example
The following example shows how to use Plex2Int in a small program. The program also uses some of the other plugNplay processes.import org.jcsp.lang.*; import org.jcsp.plugNplay.ints.*; public class Plex2IntExample { public static void main (String[] argv) { final One2OneChannelInt a = Channel.one2oneInt (); final One2OneChannelInt b = Channel.one2oneInt (); final One2OneChannelInt c = Channel.one2oneInt (); new Parallel ( new CSProcess[] { new FibonacciInt (a.out ()), new SquaresInt (b.out ()), new Plex2Int (a.in (), b.in (), c.out ()), new PrinterInt (c.in (), "--> ", "\n") } ).run (); } }
Note: this example does not produce easily understandable output, since the multiplexed stream contains only numbers -- there is no indication of the streams from which they were sourced. To get that indication, we can either useMultiplexInt
or sign each int stream to be multiplexed withSignInt
and multiplex withPlex2
.Implemntation Note
For information, here is the run method for this process:public void run () { AltingChannelInputInt[] input = {in0, in1}; // in0 and in1 are the input channels Alternative alt = new Alternative (input); while (true) { out.write (input[alt.fairSelect ()].read ()); // out is the output channel } }
- Author:
- P.H. Welch
- See Also:
PlexInt
,MultiplexInt
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Constructor Summary
Constructors Constructor Description Plex2Int(AltingChannelInputInt in0, AltingChannelInputInt in1, ChannelOutputInt out)
Construct a new Plex2Int process with the input channels in0 and in1 and the output channel out.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
run()
The main body of this process.
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Constructor Detail
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Plex2Int
public Plex2Int(AltingChannelInputInt in0, AltingChannelInputInt in1, ChannelOutputInt out)
Construct a new Plex2Int process with the input channels in0 and in1 and the output channel out. The ordering of the input channels makes no difference to the behaviour of this process.- Parameters:
in0
- an input channelin1
- an input channelout
- the output channel
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